Clang's static analyzer thinks we could be using `hosts` here when it
is NULL.  We probably weren't, but it's easy to see how it could think
so.  We were checking whether `from_addr` matched `ice->addr` three
times, and between the second on third time we might have modified the
`ice->addr`; however we only get there if it matched the second time,
so we could only make it not match at that point and avoid the third
branch.  We can't make it match where it did not before.

We'll simplify the logic a bit here so static analyzers (and humans)
can hopefully see this more readily.

When zero was passed for the size to `sub_alloc`, we were passing this
size on to `malloc` or `calloc`, which is unusual enough that static
analyzers warn about this (POSIX says that either NULL or a pointer
will be returned).

We'll instead just return NULL right away.

When the number of channels was zero, we were calling malloc with a
size of zero.  While defined, this is unusual.  And since we're
initializing the speex resampler as though there were one channel in
this case, we should probably just allocate the space for it.

Clang's static analyzer noticed the result of realloc was being
assigned to a pointer of a different type than was used to calculate
the new size.  We can make things simpler and more idiomatic here by
using the correct pointer type and letting C's pointer arithmetic
automatically handle some multiplication.

We also use the distributive property here to simplify the calculation
for memset.

The `switch_split_date` and `switch_split_time` functions only set as
many variables as they believe exist values in the input string.
Since we didn't have defaults assigned we would read undefined stack
memory if the input string didn't contain e.g. an hour.

With this commit, we use 1970 if no year is present, January if no
month is present, the first day of the month if none is given, and
zero for each of a missing hour, minute, or second.

We're moving the variable declarations down to the smallest possible
scope (a good idea in general) so we can address the use of undefined
memory by the function in a later commit.

mod_curl currently does not verify the authenticity of the peer's
certificate, and does not verify whether the common name on the
certificate matches the server.  This makes mod_curl initiated TLS
connections completely insecure.  We should fix this, but until we do,
we'll warn people that it's not doing what they may think it is.

ref: http://curl.haxx.se/libcurl/c/CURLOPT_SSL_VERIFYPEER.html
ref: http://curl.haxx.se/libcurl/c/CURLOPT_SSL_VERIFYHOST.html

* commit 'c736cf2f':
  Add sofia gateway parameter "destination-prefix"
  FS-5497 add sofia gateway parameter destination-prefix in case you need to send Invites with prefix only to this gateway

mod_graylog2: channel variables can now be automatically added as gelf additional fields in logs w/ session UUID

`curl_sendfile` generates a multipart message with Content-Type:
multipart/form-data with no separate Content-Type headers in the parts
for each non-file argument.  These parts therefore default to
text/plain.  However, prior to this commit, we were putting the URL
encoded POST data into these parts, which is not correct.  We should
be putting raw text into the parts.

With this commit, we urldecode each argument key and value before
composing the multipart message.

See:

  http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2

FS-5497 add sofia gateway parameter destination-prefix in case you need to send Invites to your provider with prefix only to this gateway

FS-5497 add sofia gateway parameter destination-prefix in case you need to send Invites with prefix only to this gateway

* commit 'd1abf274':
  REFER_EVENT is missing from the message names array

* commit '4d0b875d':
  fix mod_fifo presence https://jira.freeswitch.org/browse/FS-6732

usleep is deprecated and disabled in glibc 2.12 unless requested. Use
nanosleep instead if available.

This fixes the following compiler warning:

    ./src/zrtp_iface_scheduler.c: In function 'zrtp_sleep':
    ./src/zrtp_iface_scheduler.c:96:2: warning: implicit declaration of
    function 'usleep' [-Wimplicit-function-declaration]
      usleep(msec*1000);
      ^

These two files should only be built when OpenSSL is not enabled. See
the configure script of the original sources and Makefile from upstream.
(RNG_EXTRA_OBJS)

Fixes a -Wimplicit-function-declaration warning.